This investigation elucidates the performance of using nanoscale zero-valent iron (nZVI) and hydrogen peroxide (H₂O₂) in the degradation of sulfamethazine in water. nZVI was mass-produced using the reductive precipitation method in a rotating packed bed with blade packings. The dependences of the degradation efficiency of sulfamethazine on pH, H₂O₂ concentration, nZVI dosage, and initial sulfamethazine concentration were assessed. The degradation efficiency of sulfamethazine at pH 3 substantially exceeded those at other pH 5, 7, 9, and 11. An optimal H₂O₂ concentration for degrading sulfamethazine (10 mg/L) at pH 3 and an nZVI dosage of 28 mg/L was 1 mmol/L. The degradation efficiency of sulfamethazine increased as the nZVI dosage was increased and the initial sulfamethazine concentration was decreased. The degradation efficiency of sulfamethazine (10 mg/L) within 5 min was 99% at pH 3 with an H₂O₂ concentration of 1 mmol/L and an nZVI dosage of 28 mg/L. However, the degradation efficiency of sulfamethazine (10 mg/L) using the nZVI/H₂O₂ process with commercial nZVI from Sigma-Aldrich was 4% at 5 min under the same conditions. Accordingly, the nZVI/H₂O₂ process with the mass-produced nZVI has considerable potential for the enhanced degradation of sulfamethazine in water.

这项研究阐明了使用纳米级零价铁（nZVI）和过氧化氢（H ₂ O ₂）降解水中的磺胺二甲嘧啶的性能。使用还原沉淀法在带叶片填料的旋转填充床中大量生产nZVI。评估了磺胺二甲嘧啶的降解效率对pH，H ₂ O ₂浓度，nZVI剂量和初始磺胺二甲嘧啶浓度的依赖性。pH 3时磺胺二甲嗪的降解效率大大超过其他pH 5、7、9和11时的降解效率。最佳H ₂ O ₂在pH 3和nZVI剂量为28 mg / L时，降解磺胺二甲嗪（10 mg / L）的浓度为1 mmol / L。磺胺二甲基嘧啶的降解效率随着nZVI剂量的增加和磺胺二甲基嘧啶的初始浓度的降低而增加。在pH 3下，H ₂ O ₂浓度为1 mmol / L，nZVI剂量为28 mg / L时，磺胺二嗪（10 mg / L）在5分钟内的降解效率为99％。但是，在相同条件下，使用Sigma-Aldrich的商用nZVI进行nZVI / H ₂ O ₂处理时，磺胺二嗪（10 mg / L）的降解效率为4％。因此，nZVI / H ₂ O ₂ 大量生产的nZVI的制备方法具有增强水中磺胺二甲嘧啶降解的巨大潜力。